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Battery long term storage levels

Thorsteenster

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Apr 23, 2011
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235
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Hey hey,
So I'd ordered a few batteries from liionwholesale, and really more than I needed and likely to see very little if any use.
From my days in RC with LiPos it was recommended to discharge a battery to a storage level when it wasn't going to be used for awhile.
Should I do the same with the 18650s and 14400s I bought?
 



Unown (WILD)

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Sep 4, 2020
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Hey hey,
So I'd ordered a few batteries from liionwholesale, and really more than I needed and likely to see very little if any use.
From my days in RC with LiPos it was recommended to discharge a battery to a storage level when it wasn't going to be used for awhile.
Should I do the same with the 18650s and 14400s I bought?
Couldn't hurt
 

Dusty_Lenses

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Joined
Apr 15, 2022
Messages
65
Points
18
Hey hey,
So I'd ordered a few batteries from liionwholesale, and really more than I needed and likely to see very little if any use.
From my days in RC with LiPos it was recommended to discharge a battery to a storage level when it wasn't going to be used for awhile.
Should I do the same with the 18650s and 14400s I bought?
Every time I find a deal on quality 10440's and harder to find sizes I buy extra even when I dont need them. I check all the cells and charge / discharge to 3.8V before I put them away. I hear its an ideal voltage for long term storage.
 

RedCowboy

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Jul 10, 2015
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12,169
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Yes dusty is correct, you don't want to store them discharged !
Also it's best not to store them fully charged which would be about 4.2V ....... if you're storing long term you want them at nominal voltage which is 3.5-3.7V. for long term storage which will yield the least degradation.
 

Thorsteenster

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Apr 23, 2011
Messages
235
Points
28
I think my charger has a preset voltage it discharges to based on battery chemistry, been quite a while since I've used it.
But it 3.5-3.8 seems it was around the recommended storage level.
One of the chargers that came with one of my el cheapo Cool Lasers laser will get sacrificed as a battery connector.
I'll post back once I do with voltage and a pic. While I don't use it often, I love my old Bantam e-Station charger/balancer.
 

RedCowboy

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Jul 10, 2015
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Thorsteenster

Active member
Joined
Apr 23, 2011
Messages
235
Points
28
So I soldered up a battery holder, ran the wires out through where the AC prongs were and up the sides where I tinned them and hot glued to act as posts I can clip on the alligator leads that came with the charger.
Selecting the LiIo profile gives me a default storage v of 3.6v and out of the box it was 3.7v.
I may leave well enough alone being the max discharge rate is 1A, and currently only running at 0.7a, even 0.1v is going to take awhile. Thinking I'll just check the batteries and see if they're within range lol
Here's my charger, older now but still a goody.
IMG_20221121_105905319_HDR.jpg
 




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